Cosmo released a v20 firmware update fix today.Yesterday I?ve did a factory reset with v20 firmware update and installed all apps that I have in the past.Today , Planet released a firmware v20 fix. I?ve tried it. But the update didn?t install. An error has appeared after boot. Has anybody experienced this ?Thank you.

I did a factory reset yesterday too. Now my phone works. I'm too tired to do it again for the 'fixed' update.

OK.Thanks for the information.Today I' ve installed v16 firmware from this site ( ota test provided by ninji in this forum ). But after this, v19 ota upgrade didn' t install. So, I' ve installed the v19 firmware from ninji ( also in this forum ). Now I am again with v19 firmware. Now Play Protect is certified again. Check your Play Protect certification status

Open the Google Play Store app . Tap Menu. Settings. Under "Play Protect certification," you'll see if your device is Play Protect certified.

Let' s wait if the v21 firmware will install without errors.Note : TWRP from ninji is also working without asking for password.